TMS77C82 datasheet(9/49 Pages) TI

9 / 49 page

TMS370Cx0x

8-BIT MICROCONTROLLER

SPNS029C – SEPTEMBER 1995 – REVISED FEBRUARY 1997

POST OFFICE BOX 1443

• HOUSTON, TEXAS 77251–1443

peripheral file (PF) (continued)

Table 4. TMS370Cx0x Peripheral File Address Map

ADDRESS RANGE

PERIPHERAL FILE

DESIGNATOR

DESCRIPTION

1000h – 100Fh

P000 – P00F

Reserved

1010h – 101Fh

P010 – P01F

System and EPROM / EEPROM control registers

1020h – 102Fh

P020 – P02F

Digital I / O port control registers

1030h – 103Fh

P030 – P03F

Reserved

1040h – 104Fh

P040 – P04F

Timer 1 registers

1050h – 105Fh

P050 – P05F

Serial communications interface registers

1060h – 10FFh

P060 – P0FF

Reserved

data EEPROM

The TMS370Cx0x devices, containing 256 bytes of data EEPROM, have their memory mapped beginning at

location 1F00h and continuing through location 1FFFh. Writing to the data EEPROM module is controlled by

the data EEPROM control register (DEECTL) and the write-protection register (WPR). Programming algorithm

examples are available in the

TMS370 Family User’s Guide (literature number SPNU127) or the TMS370

Family Data Manual (literature number SPNS014B). The data EEPROM features include the following:

D Programming:

–

Bit-, byte-, and block-write / erase modes

–

Internal charge pump circuitry. No external EEPROM programming voltage supply is needed.

–

Control register: Data EEPROM programming is controlled by the DEECTL located in the PF frame

beginning at location P01A. See Table 5.

–

In-circuit programming capability. There is no need to remove the device to program.

D Write protection. Writes to the data EEPROM are disabled during the following conditions.

–

Reset. All programming of the data EEPROM module is halted.

–

Write protection active. There is one write-protect bit per 32-byte EEPROM block.

–

Low-power mode operation

D Write protection can be overridden by applying 12 V to MC.

Table 5. Data EEPROM and Program EPROM Control Registers Memory Map

ADDRESS

SYMBOL

NAME

P01A

DEECTL

Data EEPROM control register

P01B

—

Reserved

P01C

EPCTL

Program EPROM control register

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